Plate bending and straightening machine.



No. 807,088. I PATENTED DEC. 12, 1905.

A. G. PATRICK.

PLATE BEN-DING AND STRAIGHTE NING MACHINE.

APPLICATION FILED FEB. l, 1906.-

2 SHEETS-SHEET 1.

Witnesses, Inyentor PATENTED DEC. 12, 1905.

A. G. PATRICK. PLATE BENDING AND STRAIGHTENING MACHINE.

APPLICATION FILED FEB. I 1905.

2 SHEETS-SHEET 2.

T D STA-EBB PATENT F j ANDREW CRAWFORD PATRICK, F JOHNSTONE, SCOTLAND.

PLATE eemomc-r. AND sTRAIGi-ITENIN MA H INE,

.el'o. sozoss.

To all whom it may concern: I

Be it known that I, ANDREW CRAWFORD PATRICK, a subject of the King of the United Kingdom of Great Britain and Ireland, and

a resident of Johnstone, county of Renfrew, Scotland, have invented certain new and useful Improvements in Plate Bending and Straightening Machines, of which the followits isa specification.

- "This invention relates to plate-bending machines; and it has-for its object to adapt such machines for resetting or straightening plates which in passing through the rolls have been bent beyond the required curvature, and this" .5.

*rolls 'instead of, as is usual in three-roller machines, having to run the plate clear of the by merely returning the plate through' the rolls and enter it again in inverted position.

' The invention is illustrated, by way 0f..ex-

ample, in the accompanying drawings, in

" which Figure, 1 is a front elevation, and Fig. 2 an end elevation, of one embodiment of the improved plate-bending machine as adapted for bending and also for resetting or straightening plates;=and Fig. 3 is an end elevation showing a modification adapted mainly for straightening plates.-

'As shown by the drawings, the improved machine comprises side cheeks A A, in which are housed the ends of the three usual rollers 7 B B B for bending plates, the said rollers being'clr iven and adjusted by the usual constr udtioh of gearing, as shown. A suppleusual way, ,or it may be raised into such position' that,on"retur1iing through the rolls a plate which has been overset,the fourth roller B bears on the plate and more or less tends to flatten it. Thus when the machine is required to be, used for the usual work of plate-bending the fourth roller B is lowered into a position in which its upper sideis not a above the level of the top side of the two driven bottom rollers B B. If a plate has been overset and-required to be flattened or straightened out, the fourth roller B is loweredor runup to about th position shown Specification of Letters Patent.

. Application filed February 1,1905. Serial No. 248,701.

Patented Dec. 12, 1905;

at Fig. 1, so that itsv bottom surface clears the curved plate in the machine, and as the plate is returned through the rolls B B to? ward the fourth roller B the curve in the 3 plate is partially or wholly taken out by depressing said fourth roller to "the required degree. While the machine is thus particu- 6 larly adapted for resetting overset plates, it

- may also be used for finishingv the plate perfectly flat and for straightening bent or buckled plates by suitably setting the fourth roller and usingthe machine as an'ordinary 5 plate-straightening machine.

In the heavier class of machines the journal ends 6' of the roller B are housedin inclined guideways C in the side cheeks, so that the roller is run up or dowmas indicated-by dot- 7 ted lines at Fig. 2, by screws D or like means, the screw-shaftsD in the exampleshown-being operated by worm-wheels E }tl1ereon,.driven from WOI'mSF on a shaftG, furnished with a hand-wheel I When the machine is to be used only for straightening bent or buckled plates, the modification shown at Fig; 3 is employed. In this case the additional roller B issupported in end bearings 5 fitted to slide vertically in 80.

the side cheeks A, the position of the roller being adjusted to suit different thicknesses of plates by means of screw-shafts D D at each end, operated by a worm-wheel nutd from a worm-shaft E; This machine may be used 5 for bending plates, but only to such a curvature as will permit the plate to clear the roller B, which is then raised, so that its lower edge is above the level of that of the top roller B.

The four-roller machines herein described 9 have the advantage over the ordinary sevenroller mangles orfiattening-machines not only of being less costly in construction, but that they deal more effectively with the flattening of plates, owing to thei'act that in the fourroller machine the plate can be bent up round the top bending-roller, and in running it back under the straightening-roller to take the set out of the plate, it is more effectively dealt with than in passing itscveral times back and i forward through the ordinary seven-roller machine. r

Having now described my invention, what I claim, and desire to secure lay Letters Patent of the United States, is

The combination of a plate bending ma- I chine comprising a. set of three bending-rollers In testimony whereoflhave signed myname and means for operatingmhe same, of a supb0 this specification in thepresence of two snb- I0 pleinental roller normallyheld in an inoperscribing witn'esse's. ative position, guides for said supplemental roller} and means for moving sziid roiler in ANDRE CRAWFORD PATRICK said guides to bring it; in line with any one of \Vibne's'ses:

said bending-rollers to form a four-roller plute- JNO. KELLIE,

straightening machine. ALEXANDER FYFE. 

